Program to find the Perimeter of a Regular Polygon

Given the number of sides 'n' and the length of side 's' of a regular polygon, the task is to find out the Perimeter of this polygon.

Examples: 

Input: n = 7, s = 10
Output: Perimeter : 70
Since the sides are 7,
Hence the given polygon is Heptagon.
Therefore. Perimeter = 7*10 = 70

Input: n = 5, s = 2.5
Output: Perimeter : 12.5
Since the sides are 5,
Hence the given polygon is Pentagon.
Therefore. Perimeter = 5*2.5 = 12.5

Approach: In geometry, a regular polygon is a closed figure with all sides equal. It is a two-dimensional figure. 

Perimeter of a Regular Polygon = Number of sides * Length of each side

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Below is the implementation of the above approach: 

Perimeter of Regular Polygon 
with 5 sides of length 2.500000 = 12.500000

Time Complexity: O(1), since there is no loop or recursion.
Auxiliary Space: O(1), since no extra space has been taken.